hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Tom Nichols <tmnich...@gmail.com>
Subject help w/ table mapreduce job
Date Tue, 10 Feb 2009 16:17:38 GMT
Hi,

I'm trying to write a M/R job to do the following:

- Scan a given table and collect unique column names
- Write those column names to another table with the source table name
as the row key, and columns in the format (Cols:<sourceColName>,
<sourceColName)

I'm not sure what I'm doing wrong.  It appears that the mapper is
configured and then immediately closed w/o scanning any rows.  I've
verified there is data in my source table.  I don't see the reduce
task run at all.  Attached is the code and below is the log output
from running the task.  Thanks in advance for any pointers.

2009-02-10 11:14:55,087 INFO  (main)  JvmMetrics - Initializing JVM
Metrics with processName=JobTracker, sessionId=
2009-02-10 11:14:55,151 WARN  (main)  JobClient - No job jar file set.
 User classes may not be found. See JobConf(Class) or
JobConf#setJar(String).
2009-02-10 11:14:55,610 INFO  (main)  TableInputFormatBase - split:
0->localhost:,
2009-02-10 11:14:55,840 INFO  (main)  JobClient - Running job: job_local_0001
2009-02-10 11:14:55,890 INFO  (Thread-11)  TableInputFormatBase -
split: 0->localhost:,
2009-02-10 11:14:55,931 INFO  (Thread-11)  MapTask - numReduceTasks: 1
2009-02-10 11:14:55,957 INFO  (Thread-11)  MapTask - io.sort.mb = 100
2009-02-10 11:14:56,239 INFO  (Thread-11)  MapTask - data buffer =
79691776/99614720
2009-02-10 11:14:56,239 INFO  (Thread-11)  MapTask - record buffer =
262144/327680
2009-02-10 11:14:56,863 INFO  (main)  JobClient -  map 0% reduce 0%
2009-02-10 11:14:59,558 INFO  (Thread-11)
MetadataMapReduceJob$MetadatMapper - Mapper for table
DayAheadHourlyLMP configured
2009-02-10 11:14:59,561 INFO  (Thread-11)
MetadataMapReduceJob$MetadatMapper - Mapper for table
DayAheadHourlyLMP closed
2009-02-10 11:14:59,561 INFO  (Thread-11)  MapTask - Starting flush of
map output
2009-02-10 11:14:59,612 INFO  (Thread-11)  MapTask - Index: (0, 2, 6)
2009-02-10 11:14:59,613 INFO  (Thread-11)  TaskRunner -
Task:attempt_local_0001_m_000000_0 is done. And is in the process of
commiting
2009-02-10 11:14:59,616 INFO  (Thread-11)  LocalJobRunner -
2009-02-10 11:14:59,616 INFO  (Thread-11)  TaskRunner - Task
'attempt_local_0001_m_000000_0' done.
2009-02-10 11:14:59,648 INFO  (Thread-11)
MetadataMapReduceJob$MetadataReducer - Metadata Reducer is configured
2009-02-10 11:14:59,663 INFO  (Thread-11)  Merger - Merging 1 sorted segments
2009-02-10 11:14:59,666 INFO  (Thread-11)  Merger - Down to the last
merge-pass, with 0 segments left of total size: 0 bytes
2009-02-10 11:14:59,708 INFO  (Thread-11)  TaskRunner -
Task:attempt_local_0001_r_000000_0 is done. And is in the process of
commiting
2009-02-10 11:14:59,709 INFO  (Thread-11)  LocalJobRunner - reduce > reduce
2009-02-10 11:14:59,710 INFO  (Thread-11)  TaskRunner - Task
'attempt_local_0001_r_000000_0' done.
2009-02-10 11:14:59,866 INFO  (main)  JobClient - Job complete: job_local_0001
2009-02-10 11:14:59,867 INFO  (main)  JobClient - Counters: 11
2009-02-10 11:14:59,867 INFO  (main)  JobClient -   File Systems
2009-02-10 11:14:59,868 INFO  (main)  JobClient -     Local bytes read=38422
2009-02-10 11:14:59,868 INFO  (main)  JobClient -     Local bytes written=77300
2009-02-10 11:14:59,868 INFO  (main)  JobClient -   Map-Reduce Framework
2009-02-10 11:14:59,868 INFO  (main)  JobClient -     Reduce input groups=0
2009-02-10 11:14:59,868 INFO  (main)  JobClient -     Combine output records=0
2009-02-10 11:14:59,868 INFO  (main)  JobClient -     Map input records=0
2009-02-10 11:14:59,868 INFO  (main)  JobClient -     Reduce output records=0
2009-02-10 11:14:59,869 INFO  (main)  JobClient -     Map output bytes=0
2009-02-10 11:14:59,869 INFO  (main)  JobClient -     Map input bytes=0
2009-02-10 11:14:59,869 INFO  (main)  JobClient -     Combine input records=0
2009-02-10 11:14:59,869 INFO  (main)  JobClient -     Map output records=0
2009-02-10 11:14:59,869 INFO  (main)  JobClient -     Reduce input records=0

Mime
View raw message